officials say al asiri is behind the foiled 2009 underwear bomb plot to bring down an airliner approaching detroit on christmas day and a 2010 plot to send bombs in printer cartridges in cargo planes bound for the u.s. both plots were foiled at the last minute. in 2009, al asiri even planted a bomb on his own brother in his underwear or a body cavity. the brother got close to saudi arabia's counter terror chief and set it off, killing himself but not the saudi minister. >> what does it say that he does this with his own brother? >> it says that he's absolutely ruthless. not only is ibrahim al asiri absolutely ruthless, he is, according to leading explosive experts in the west, really good at what he does. he's proud the most sophisticated devices ever seen from al qaeda. >> reporter: last year, u.s. officials say al asiri was behind another foiled plot to send another bomb in the underwear of a terrorist on a commercial plane bound for the u.s. the head of the tsa called that a next gen device. >> it was a new type of explosive that we had never seen and either attempted in the u.s. or around the